2121852831 has 24 divisors (see below), whose sum is σ = 3404527920. Its totient is φ = 1170675072.

The previous prime is 2121852809. The next prime is 2121852851. The reversal of 2121852831 is 1382581212.

It is not a de Polignac number, because 2121852831 - 2⁶ = 2121852767 is a prime.

It is a super-2 number, since 2×2121852831² = 9004518872845429122, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 2121852792 and 2121852801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121852851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244606 + ... + 253131.

It is an arithmetic number, because the mean of its divisors is an integer number (141855330).

Almost surely, 2^2121852831 is an apocalyptic number.

2121852831 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2121852831 is a deficient number, since it is larger than the sum of its proper divisors (1282675089).

2121852831 is a wasteful number, since it uses less digits than its factorization.

2121852831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497783 (or 497776 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 2121852831 is about 46063.5737975247. The cubic root of 2121852831 is about 1285.0057948635.

The spelling of 2121852831 in words is "two billion, one hundred twenty-one million, eight hundred fifty-two thousand, eight hundred thirty-one".